%%%-------------------------------------------------------------------
%%% @author admin
%%% @copyright (C) 2021, <COMPANY>
%%% @doc
%%%
%%% @end
%%% Created : 30. 十二月 2021 14:51
%%%-------------------------------------------------------------------
-module(pack_behav).
-author("admin").

%% pack call back.
-callback pack(
    MsgList::list())
      -> {ok, Bin::binary()}
    | error.